Strip material folding and packaging machine

ABSTRACT

A STRIP MATERIAL FOLDING AND PACKAGING MACHINE COMPRISING A STATIONARY FRAME AND A MOVABLE CARRIAGE ADAPTED TO RECIPROCATE BACK AND FORTH ALONG GUIDE MEANS DISPOSED ON THE STATIONARY FRAME. THE MOVING CARRIAGE IS PROVIDED WITH A PLATFORM FOR RECEIVING CONTAINERS THEREON INTO WHICH THE STRIP MATERIAL IS FED FOR FOLDING AND PACKAGING OF THE MATERIAL. A SLATTED DRUM IS DISPOSED ABOVE THE STATIONARY FRAME AND MOVING CARRIAGE FOR GUIDING STRIP MATERIAL BETWEEN A PAIR OF OPPOSED ROTATING ROLLERS. THE ROLLERS ARE MOUNTED ON THE UPPER END OF A SWINGING AR. THE SWINGING ARM IS PIVOTALLY MOUNTED ADJACENT ITS CENTER PORTION TO THE MOVING CARRIAGE. THE LOWER END OF THE SWINGING ARM IS PROVIDED WITH A COUNTER WEIGHT. BETWEEN THE PIVOT POINT OF THE SWINGING ARM AND THE COUNTER WEIGHT IS A PITMAN ARM PIVOTALLY CONNECTED TO THE SWINGIN ARM AT ONE END AND WITH ITS OTHER END PIVOTALLY CONNECTED TO AN ECCENTRIC ROLLER BEARING MOUNTED ON A DRIVE SHEAVE WHICH CAUSES THE SWINGING ARM AND THE ROLLES CARRIED THEREBY TO ROCK OR SWING BACK AND FORTH SO AS TO CAUSE THE STRIP MATERIAL TO BE FED INTO THE CONTAINER DISPOSED ON THE CARRIAGE AND CAUSE THE MATERIAL TO BE FOLDED IN THE BOX. A SUBSTANTIALLY HORIZONTAL SHEAVE IS CARRIED BY THE MOVING CARRIAGE AND IS PROVIDED WITH AN ECCENTRIC ROLLER WHICH RIDES IN SPACED ANGELE IRON BARS EXTENDING TRANSVERSELY ACROSS THE STATIONARY FRAME SO THAT WHEN THE HORIZONTAL ECCENTRIC SHEAVE IS ROTATED IT CAUSES THE MOVING CARRIAGE TO MOVE BACK AND FORTH LONGITUDINALLY OF THE FRAME TO FEED THE STRIP MATERIAL INTO THE CONTAINERS ON THE MOVING CARRIAGE TO PROVIDE A NUMBER OF LAYERS OF MATERIAL IN THE CONTAINER UNTIL THE CONTAINER IS COMPLETELY FILLED. A BELT DRIVE ARRANGEMENT IS PROVIDED FOR DRIVING THE DRIVE SHEAVE FOR THE PITMAN ARM AND THE SWINGING ARM AND FOR THE HORIZONTAL ECCENTRIC SHEAVE AND THE CARRIAGE OPERATIVELY CONNECTED THERETO.

Jan. 26, 1971 J. R. ZIMMERMAN 3,557,524

A STRIP MATERIAL FOLDING AND 'PACKAGING MACHINE A5 Sheets-Sheet 2 Film1 May 28, 1 969 INVENTOR. Jod/v ,e Z//z//Mfe/WAM A17 7 One/VE Y6,

Jail- 26, 41971- .J. R.ZIMMERMAN l STRIPFMATERIAL FOLDNG AND PACKAGING MACHINE Filed may 2a, 1969 5 Sheets-Sheet 3 INVENTOR. daf/N e. Z//M//fe/z/M/*f Mh/M Jan. 1*"971 Filed May 2e, 1969 J, R. ZIMMERMAN 3,557,524 'STRIP MATERIAL FOLDING AND-PACKAGING MACH-INE 5 Sheets-Sheet 4 FIG; 6.'4

N mwaN'roR. x dof/N e Z//WME/QA/MM rrog/Vs/.S

Jan. 26,1971 v.1.12.z|M'|\|E'.R|\-'u\u-1 3,557,524 r amai-MATERIAL FOLDINGY AND PACKAGING MACHINE y 'Filed Mayfe, i969 f s sheets-sheet 5 l B Y .o7-roem@ is.

United States Patent O 3,557,524 STRIP MATERIAL FOLDING AND PACKAGING MACHINE John R. Zimmerman, 417 S. Wayne St., Orwigsburg, Pa. 17961 Filed May 28, 1969, Ser. N0. 828,504 Int. Cl. B65b 63/08 U.S. Cl. 53--116 20 Claims ABSTRACT OF THE DISCLOSURE Y A strip material folding and packaging machine cornprising a stationary frame and a movable carriage adapted to reciprocate back and forth along guide means disposed on the lstationary frame. The moving carriage is provided with a platform for receiving containers thereon into which the strip material is fed for folding and packaging of the material. A slatted drum is disposed above the stationary frame and moving carriage for guiding strip material between a pair of opposed rotating rollers. The rollers are mounted on the upper end of a swinging arm. The swinging arm is pivotally mounted adjacent its center portion to the moving carriage. The lower end of the swinging arm is provided with a counter weight. Between the pivot point of the swinging arm andV the counter weight is a Pitman arm pivotally connected to the swinging arm at one end and with its other end pivotally connected to an eccentric roller bearing mounted on a drive sheave which causes the swinging arm and the rollers carried thereby to rock or swing back and forth so as to cause the strip material to be fed into the container disposed on the carriage and cause the material to be folded in the boX. A substantially horizontal sheave is carried by the moving carriage and is provided with an eccentric roller which rides in spaced angle iron bars extending transversely across the stationary frame so that when the horizontal eccentric sheave is rotated it causes the moving carriage to move back and forth longitudinally of .the frame to feed the strip material into the containers on the moving carriage to provide a number of layers of material in the container until the container is completely lled. A belt drive arrangement is provided for driving the drive sheave for the Pitman arm and the swinging arm and for the horizontal eccentric sheave an the carriage operatively connected thereto.

The present invention relates to a strip material folding and packaging machine which will fold continuous strips of material or ribbon or fabric back and forth, and at the same time, from side to sideV so that a continuous strip of material may be evenly deposited into a suitable container.

lIt is an object of the present invention to provide a fabric or strip material folding machine which is of relatively simple construction and which requires low maintenance and is suitable for continuous operation.

Another object of the present invention is to provide a strip material folding and packaging machine in which a stationary frame is provided with a movable carriage thereon carrying a plurality of boxes or containers for receiving strip material therein, and in which the carriage is reciprocated back and forth along the stationary frame to permit a layer of strip material to be deposited into the container, and thereafter successive layers superimposed over one another 'in the container.

It is another object of the present invention to provide a strip material folding and packaging machine provided with a stationary frame and a moving carriage disposed on the stationary frame with a drive means carried by the stationary frame yand operatively connected to the moving carriage so as to cause a swinging arm carried by the moving carriage to swing or rock back and forth to fold a strip of material upon itself as it is fed into a container carried by the moving carriage.

It is yet another object of the present invention to provide a strip material folding and packaging machine having a stationary frame with a reciprocating carriage carried by the frame with the carriage being provided with a plurality of swinging arms pivotally connected to the carriage adjacent their midpoint and further provided with a counter weight adjacent the lower end thereof with a Pitman arm means connected to an eccentric sheave so as to cause the swinging arm to swing from side to side of the moving carriage as the moving carriage is reciprocated in a direction perpendicular to the swinging movement of the swinging arms.

It is another object of the present invention to provide a strip material folding and packaging machine in which motor means are provided for operating the machine and the motor means are secured to a stationary frame and a moving carriage is reciprocated along the stationary frame and belt drive means are operatively connected to the moving carriage for swinging a plurality of rocking arms back and forth on the moving carriage.

It is yet a further object of the present invention to provide a fabric folding and packaging machine in which a stationary frame is provided which carries a moving carriage and in which the moving carriage reciprocates in a longitudinal direction along the stationary frame and in which the moving carriage is provided with a plurality of swinging arms that swing transversely of the carriage and in a direction perpendicular to the path of travel of the carriage on the stationary frame so that a continuous strip of material can be folded back and forth upon itself as it is fed into a container carried by the moving carriage, and which can further be disposed in the co-ntainer in stacked layers which are superimposed upon one another.

A still further object of the present invention is to provide a strip material folding and packaging machine having a stationary carriage with guide means thereon and a moving carriage with roller means thereon adapted to move or reciprocate back and forth in the guide means of the stationary carriage and in which a substantially horizontally disposed eccentric sheave is carried by the moving carriage and is provided with roller means disposed thereon and extending between spaced parallel guide means on the stationary carriage so as to cause the carriage to reciprocate longitudinally of the stationary frame..

Another object of the present invention is to provide a moving carriage that reciprocates back and forth on a stationary frame so as to feed a continuous strip of material into a container carried by the moving carriage, and in which the -moving carriage is provided with a swinging arm which swings or rocks transversely of the moving carriage and which arm is provided with a pair of opposed driven rollers adjacent its upper end and a counter weight adjacent its lower end, with a Pitman arm connected to the swinging arm between the counter weight and a pivot point at which the swinging arm is pivotally connected to the moving carriage, with a drive sheave operatively connected to the Pitman arm so as to rock or swing the swinging arm transversely of the moving carriage, and with a continuous belt means carried by the drive sheave and the rollers on the swinging arm so as to rotate the rollers and the drive sheave.

It is still a further object of the present invention to provide a strip material folding and packaging machine having a stationary frame and a reciprocating carriage carried by the frame which carriage moves in a path of travel which extends longitudinally of the frame and which carriage is provided with swinging arms which swing transversely of the carriage and in which the swing- 3 ing arms and the reciprocating movement of the carriage are caused by a common drive means to which the carriage and the swinging arms are operatively connected, which drive means is secured to the stationary frame.

Various other objects and advantages of the present invention will be readily apparent from the following detailed description when considered in connection with the accompanying drawings forming a part thereof and in which:

FIG. l is a top or plan view of the strip material folding and packaging machine embodied in the present invention.

FIG. 2 is a side elevational view of the machine shown in FIG. 1.

IFIG. 3 is an end view of the machine embodying the invention, as seen when looking from the left side of FIG. 2.

FIG. 4 is an end view of the machine, similar to FIG. 3, but looking at it from the opposite end.

FIG. 5 is a section of the machine taken along the lines 5 5 of FIG. 2.

FIG. 6 is a section of the machine taken along the lines 6 6 of FIG. 5.

FIG. 7 is a section taken along the lines 7--7 of FIG. 6.

FIG. `8 is a section taken along the lines 8 8 of FIG. 5 illustrating the swinging arm embodied in the moving carriage of the machine, and

FIG. 9 is a section taken along the lines 9-9 of FIG. 5.

Referring to the drawings, the reference numeral 10 generally designates the strip material folding and packaging machine of the present invention which is provided with a stationary frame 12 and a moving carriage 14 carried by the frame. The frame is provided with a pair of vertically spaced angle iron sections 16 and 18 secured together by a plurality of vertical angle irons 19 so as to form an open -box structure 20. The frame 12 is rectangu- 1er in configuration, as best seen in FIG. 6, and the upper spaced parallel angle irons 22, as best seen in FIGS. 5 and 6, form guide means or tracks along which ride the rollers 24 of the carriage 14 as hereinafter described.

The frame 12 is provided with two spaced parallel angle irons 26, as best seen in FIG. 6, which extend between the longitudinal angle irons 22. These transverse angle irons form a slot 28 therebetween for causing the moving carriage 14 to reciprocate back and forth along the longitudinal angle irons 22, as hereinafter described.

The frame 12 is further provided with a drive motor 30 as best seen in FIGS. 3 and 6 adjacent one end thereof and having a reduction gear 32 and a drive shaft 34 extending therefrom with a drive sheave 36 connected to the end thereof.

The frame is further provided with a first driven shaft 38 as best seen in FIGS. 2 and 6, which extends parallel to the longitudinal angle irons 22, and is secured to the frame by any suitable means. The driven shaft 38 is provided with a variable sheave `40 operatively connected to the sheave 36 by a drive belt 42 as seen in FIGS. 2, 3, 5 and 6.

The opposite end of the driven shaft 38 is provided with another sheave 44, and the sheave 44 carries a reversed belt 46 which is connected to a sheave 48, see FIGS. 1, 2, 4, for rotating a slatted horizontally extending drum 50, see FIGS. 1, 2 and 5. The slatted drum 50 is rotated by the belt drive and is carried by two vertical -bars 52 secured to the opposite ends of the frame 12, FIGS. 2 and 4. The drum 50 feeds the strip material from a cutting machine not forming part of the present invention.

Also disposed on the driven shaft 38 is a triple pulley sheave 54 which can slide along the end of the shaft 38 adjacent the sheave 44, FIGS. 1, 2, 6 and 7. The shaft 38 is provided with a key 56 along which the sheave 54 slides as seen in FIGS. 2, 6 and 7. The sheave 54 is operatively connected to the fork 58, see FIGS. 2 and 7, which is connected to the carriage 14 to slide the sheave 54 along the 4 key way 56 when the carriage reciprocates as hereinafter described.

Referring to FIGS. 3, 4 and 5, it will be seen that the carriage 14 is constructed of angle irons and is provided with spaced vertical angle irons 60 between which extends transverse horizontal angle iron 62. A horizontal platform or table 64 is secured to the intermediate transverse angle iron i62 for receiving thereon containers or boxes 66 shown in FIG. 5, for receiving the strip material therein to fold and package the strip material in the box. The platform `64 is also provided with transversely extending slots 68 through which extend swinging arms 70, FIGS. 5 and 8. The carriage rollers 24 which move along the horizontal angle irons 22 of the frame |12 are disposed on the lower ends of the vertical angle irons 60 of the carriage, FIG. 6.

The swinging arms 70 are pivotally connected at their mid-points, as indicated at 72 in FIG. 5, to the carriage. The lower end of the swinging arms 70 is provided with a counterweight 74, while the upper end of the arms is provided with a pair of spaced rollers 76, as best seen in FIGS. 5 and 8. The rollers are secured to the upper ends of the arms 70 by a bracket structure 78.

The carriage carries a driven shaft 80, see FIGS. 2, 3, 4, 5 and 6, which is supported in bearing `82 carried by the angle irons y62. The carriage driven shaft is driven by belts 84 carried by the sheave 54 and the sheave 86 carried by the shaft 80. The carriage driven shaft 80 is disposed on the side of the carriage opposite from the frame to which the driven shaft 38 of the frame is connected.

The carriage is provided with spaced eccentric sheaves 88, see FIGS. 3, 4, 5 and 6, secured to the carriage by stub axles 90, journaled in vertical struts 92, secured to the carriage. The eccentric sheaves 88 are disposed on the carriage on the same side as the driven shaft 38 is disposed on the machine. The sheaves 88 are double pulley sheaves and are provided with eccentric rollers or pins 94 pivotally connected to one end of a Pitman arm 96. 'Ihe other end of the Pitman arm 96 is pivotally connected at 98 to the swinging arm 70 between the pivot point indicated at 72 and the counter weight 74 on the bottom end thereof.

The carriage driven shaft 80 is provided with spaced sheaves 100 carrying endless belts 102 for driving the eccentric double sheaves 88.

The endless belt 102 carried by a sheave 100 extends toward and over the eccentric double sheave 88, and then back to the sheave 100 thereby driving the eccentric double sheave from the sheave 100 as best seen in FIGS. 5 and 6.

The endless belt 106 carried by the other half of the double sheave 88 extends around a double sheave 108 carried by the swinging arm 70 adjacent the pivot point of the arm, and another section 110 of the belt 106 as indicated in FIG. 5, extends upwardly and over a sheave 112 connected to the roller shaft so as to rotate the roller 76 in the direction of the arrow indicated in FIG. 5.

Thereafter, the section .114 of the belt extends down and around another double sheave 116 carried on the upper end of the swinging arm 70, as seen in FIG. 5, and the section 118 of the belt extends up and over another sheave 120 which is connected to the other roller 76 so as to rotate it in the opposite direction indicated by the arrow in FIG. 5, and in an opposite direction from the .tirst mentioned roller 76. Thereafter, the belt section 122, as best seen in FIG. 5, extends down over the double sheave 116 and the belt section 124 then extends downwardly and over the double sheave 108 again, after which the belt section 106 extends over the double eccentric sheave 88 as indicated in F'IG. 5. Thus, a continuous endless belt is disposed on the double eccentric sheave 88 and the roller sheaves 112 and 120 and the double sheaves 116 and 108 carried by the swinging arm 70. This belt drive will cause the swinging arm to swing back and forth or from side to side of the carriage and will cause the rotating rollers 76 to swing back and forth carrying the strip of material 128 between the rollers and feeding it into the containers 66, as indicated in dotted lines intl-TIG. after the strip of material has been received over the slatted drum 50 from the guide arm and fork 130 sceured to thev upper portion of the bars 52 by a horizontal barl 132.

The carriage 14 is reciprocated back and forth along the longitudinal angle iron 22 of the fixed frame 12 by a horizontal eccentric sheave 134, as best seen in FIGS. 2, 5 and I6. The sheave .-134 is supported by a vertical stub axle 136, see FIGS. 2, 5 and 6, journaled in a bracket structure |138 secured to the carriage 14. 4 The sheave 134 is provided with an eccentric pin 140 which extends therebelow land is disposed between the spaced transverse angle irons 26 as best seen in FIGS. 2, 5 and y6. The sheave 134 is driven by an endless belt '142 which is carried by a sheave 144 secured to the carriage driven shaft 80, as best seen in FIG. 6. Sheave 144 is integral with a larger sheave 145 driven by belt 147 trained over sheave 89 integral with the end of sheave 88. This arrangement is for the purpose of reducing the speed of reciprocation of carriage 14. The belt 142 passes over vertical sheaves 146 securedV to a bracket structure 148 of the carriage as best seen in FIG. 5.

In operation, when it is desired to fold the strip material and package it in the cartons or containers 66 which are disposed on the carriage 14, the strip material is delivered from a cutting machine not forming part of the invention. In the presentcase there are three strips or ribbons which are fed as illustrated in the drawings through the guide arms |130and over the slatted drum 50 and thereafter passed downwardly between the pairs of rollers '76 on each of the swinging arms 70.

The machine motor 30 is set into operation and it drives the driven shaft 38 through the belted drive 42 and the driven shaft 38 in turn drives the carriage shaft 80 through the belt drive 84, FIG. 6. The carriage driven shaft 80 in turn drives the eccentric sheaves 88 through the continuous belt drive 102 so as to cause the Pitman arms 96 to rock orswing the arms 70 back and forth, as illustrated in IFIG. 5, from one side to the other side of the platform |64- so that the strips of ribbon or material 12S-are folded back and forth into the containers. The belt drives -106 also cause the opposed pairs of rollers 76 to pull the strips of material therebetween and down into the containers. As the strips of material are folded back and forth from side to side of the containers 66, the horizontal eccentric sheave 134 is driven through the belt drive 142 from the driven shaft 80 so as to cause its eccentric pin 140 to reciprocate back and forth transversely of the fixed frame 12 between the parallel angle irons 26 to reciprocate the carriage 14 longitudinally of the frame 12 with the rollers 24 rolling along the angle irons 22 of the frame. This causes the ribbon that is being folded back and forth from side to side in the box to also be laid from one end to the other end of the box so that successive layers of ribbon are superimposed or stacked upon each other until the container is lled. The fork structure 58, FIGS. 2 and 7, which is secured to the carriage will move the sheave 54 along the shaft 38 and the'key 56 as the carriage moves or reciprocates back and forth with respect to the frame.

Thus, from the foregoing description, it is apparent that the present invention provides a machine for folding and packaging strips of endless material into containers in which the frame is stationary and a sliding carriage is provided for movement along .the fixed frame so that the ribbon is properly folded back and forth upon itself from side to side as it is laid into the container and individual layers of ribbon are deposited in the container from one end of the box to the other end until the box is completely lled.

The present invention further provides a novel common drive means for both reciprocating the carriage back 6 and forth longitudinally of the fixed frame as well as providing a drive means for swinging a plurality of swinging arms from side to side of transversely of the moving carriage while the moving carriage moves in a direction perpendicular to the movement of the swinging arms.

From the foregoing description it is also apparent that the present invention provides a novel means of reciprocating a moving carriage in a longitudinal direction along a xed frame by the use of a substantially horizontally disposed eccentric sheave which travels between spaced parallel guide members disposed transversely of the movement of the movable carriage in the device.

Furthermore, it is apparent from the foregoing descrip tion that the present invention provides a drive means for 15 a swinging arm in which the swinging arm is operatively connected to a Pitman arm andan eccentric sheave member and in which the swinging arm is provided with a pair of oppositely disposed rollers and in which a single continuous belt means drives the swing arm as well as the opposed rollers and is carried by the eccentric sheave member and a driven sheave member.

Inasmuch as the location and arrangement of the relative parts may be changed without departing from the scope of the invention, it is to be understood that the invention is not to be limited to the above description, ex-

cept by the scope of the following claims.

What is claimed is:

1. A machine for folding and packaging a continuous strip of material back and forth from side to side of a container and from end to end of the container, comprising a stationary frame, a movable carriage disposed on said frame for carrying a container thereon, swinging arm means carried by said frame for folding a piece of continuous material as it is fed to a container disposed on said carriage, means for reciprocating said carriage longitudinally of said frame to form a layer of material extending from one end of the container to the other end, and common drive means operatively connected to said swinging arm means to swing it back and forth, and to said reciprocating means to reciprocate said carriage.

2. The machine of claim 1 wherein said swinging arm means comprises an elongated substantially vertical arm pivotally connected at approximately its midpoint to said carriage means, said arm having a counter weight at its lower end and a pair of driven roller means at its upper end for pulling the material therebetween.

3. The machine of claim 2 wherein said common drive means for said swinging arm includes an eccentric sheave carried by said carriage and a Pitman arm connected at one end to an eccentric roller on said sheave, and said Pitman arm has its other end pivotally connected to said swinging arm between said pivot point and said counter weight.

4. The machineof claim 2 wherein said carriage is provided with a platform for receiving containers thereon, and a transverse slot is disposed in said platform and said swinging arm extends therethrough and is disposed to swing transversely of said platform from one side to the other side of said slot.

5. The machine of claim 4 wherein said carriage includes a plurality of substantially vertical members with roller means on the bottom thereof adapted to reciprocate along said frame.

6. The machine of claim 5 wherein said reciprocating means includes spaced parallel guide means extending transversely of said frame, and a substantially horizontal sheave with an eccentric roller thereon extending between said parallel guide means, and support means secured to said carriage and supporting said horizontal sheave and roller.

7. The machine of claim 2 wherein said carriage is provided with a driven shaft connected thereto and spaced on the side of said carriage away from said eccentric sheave, a belt disposed on a sheave on said driven shaft and extending around said eccentric sheave, and a co-ntinuous single belt disposed on the eccentric sheave, and extending about two spaced sheaves carried by said swinging arm and by said pair of driven roller means whereby said belt and said continuous belt drive said eccentric sheave and said pair of roller means.

8. A machine for folding and packaging a continuous strip of material back and forth from side to side of a container placed on the machine, and from end to end of the container comprising a stationary rectangular`frarne with parallel guide tracks extending longitudinally thereof, a movable carriage with roller means disposed on said tracks for reciprocating movement therealong, said carriage having a platform for receiving a container to be lled with the strip material, transverse slot means in said platform, a substantially vertical swinging arm extending through said slot means and pivotally connected to said carriage substantially adjacent its midpoint, drive means for swinging said arm from side to side of said carriage, and other drive means for moving said carriage along said tracks from one end to the other end of said stationary frame.

9. The machine of claim 8 whereinsaid drive means includes a substantially vertical eccentric sheave with a Pitman arm eccentrically connected at one end thereof and at its opposite end to said arm.

10. The machine of claim 9 wherein said arm is provided with a pair of oppositely disposed driven rollers on its upper end for feeding material therebetween, and a drive sheave is provided for driving said eccentric sheave and said rollers, and sheaves are disposed on the upper end of said arm to rotate said rollers, and other spaced sheaves are disposed on said arm below said rollers and above said arm pivot point, and an endless belt is wrapped around and carried by said eccentric sheave, roller sheaves and arm sheaves.

11. The machine f claim 9 wherein said swinging arm is provided with a counter weight on its lower end, and said Pitman arm is connected to said swinging arm between said pivot point and said counter weight.

12. The machine of claim 9 wherein said eccentric sheave is secured to said carriage for movement therewith.

13. The machine of claim 9 wherein said other drive means, includes a substantially horizontally eccentric sheave with aneccentric roller thereon and spaced parallel track bars are provided for guiding said eccentric roller.

14 The` machine of claim 13 wherein said horizontal eccentric sheave is secured to said carriage for movement therewith, and said parallel bars are xed to said frame andsaid horizontal eccentric roller is disposed between said bars.

` 15. The machine of claim 14 wherein said bars extend transversely of said frame and said carriage moves perpendicular to the longitudinal axis of said frame.

16. `The machine of claim 15 wherein said carriage is provided with a longitudinal driven shaft and first belt means are operatively connected to said driven shaft and to said eccentric` sheave to drive it, and second belt means are connected to said driven shaft and said horizontal sheave over small vertical sheaves to drive it.

17. The machine of claim 16 wherein a drive shaft is secured to said frame and third belt means are connected thereto and to said driven shaft to drive said driven shaft. 18. The machine of claim 17 'wherein said drive shaft is provided with a slidable sheave along one end thereof and a key is provided on the shaft for guiding said slidable sheave therealong. 19. The machine of claim 18 wherein said carriage has secured thereto a fork member connected to said slidable sheave to slide it along said shaft when said carriage moves along its tracks.

20. The machine of claim 19 wherein said frame has a drive motor secured thereon and fourth belt means 0peratively connecting said motor to said drive shaft.

References Cited UNITED STATES PATENTS 2,679,964 6/1954 Farmwaid 53- 116 3,059,308. 10/1962 Friedel 53-116X TRAVIS S. MCGEHEE, Primary Examiner U.s. C1. X.R. 27o-79 

